Run results for: Array vs Object vs Map vs WeakMap access (123123)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:123.0) Gecko/20100101 Firefox/123.0

Browser: Firefox 123

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

array[0]

97.0M/s

object.a

93.2M/s

object[symbol]

83.2M/s

Map.get

78.3M/s

WeakMap.get

47.9M/s

View exact numbers

Test name	Executions per second
✓ array[0]	96,988,768 Ops/sec
object.a	93,182,440 Ops/sec
object[symbol]	83,239,528 Ops/sec
Map.get	78,261,328 Ops/sec
WeakMap.get	47,857,120 Ops/sec

Script Preparation code:

var map = new Map([["0",1]]);

var array = [1];

var symbol = Symbol('next');
var object = {["0"]: 1, [symbol]: 1 };
var weakMap = new WeakMap([[object,1]])
var x = 0;

Tests:

Map.get
x += map.get("0");
WeakMap.get
x += weakMap.get(object)
array[0]
x += array[0]
object.a
x += object.a
object[symbol]
x += object[symbol]